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Deprecated: Implicit conversion from float 300.79999999999995 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Clin+Cancer+Res 2014 ; 20 (23): 5927-36 Nephropedia Template TP
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Phase II clinical trial of amatuximab, a chimeric anti-mesothelin antibody with pemetrexed and cisplatin in advanced unresectable pleural mesothelioma #MMPMID25231400
Hassan R; Kindler HL; Jahan T; Bazhenova L; Reck M; Thomas A; Pastan I; Parno J; O?Shannessy DJ; Fatato P; Maltzman JD; Wallin BA
Clin Cancer Res 2014[Dec]; 20 (23): 5927-36 PMID25231400show ga
Purpose: Amatuximab is a chimeric monoclonal antibody to mesothelin, a cell surface glycoprotein highly expressed in malignant pleural mesothelioma (MPM). Based on its synergy with chemotherapy in pre-clinical studies, we evaluated the antitumor activity of amatuximab plus pemetrexed and cisplatin in patients with unresectable MPM. Experimental Design: In a single-arm phase II study, amatuximab 5 mg/kg was administered on days 1 and 8 with pemetrexed, 500 mg/m2 and cisplatin, 75 mg/m2 on day 1 of 21-day cycles for up to 6 cycles. Patients with response or stable disease received amatuximab maintenance until disease progression. Primary endpoint was progression-free survival (PFS) at 6 months. Secondary endpoints were overall survival (OS), response rate and safety. Results: Eighty nine patients were enrolled at 26 centers. Median of five cycles (range 1?6) of combination treatment was administered and 56 (63%) patients received amatuximab maintenance. Combination therapy resulted in no overlapping toxicities. Eleven patients (12.4%) had amatuximab-related hypersensitivity reactions. Responses included partial responses in 33 (40%) and stable disease in 42 (51%). Six month-PFS rate was 51% (95% CI: 39.1, 62.3), median PFS 6.1 months (95% CI: 5.8, 6.4) and median OS 14.8 months (95% CI: 12.4, 18.5) with 29 patients alive at data cut-off. Conclusions: Amatuximab with pemetrexed and cisplatin was well-tolerated with objective tumor response or stable disease rate of 90% by independent radiological review. Although PFS was not significantly different from historical controls, the median OS was 14.8 months with a third of patients alive and 5 continuing to receive amatuximab at the time of analysis.